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riadik2000 [5.3K]

3 years ago

10

All isotopes of technetium are radioactive, but they have widely varying half-lives. If an 800.0 g sample of technetium-99 decay

s to 100.0 g of technetium-99 in 639 000 y. What is it's half-life?

1 answer:

erica [24]3 years ago

3 0

The formula for A = Ao (1/2) ^ t/h
So sub in.
100 = 800 (1/2) ^ 639,000/?
That's all i can do lol

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